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How did John Titor sign it in 2001? The Dorian S Nakamoto signature could be time-faked also.

In the 1950's, seeds were exposed to Cobalt-60 and then sold for people to plant and grow into whatever they were mutated into. It was called "atomic gardening". https://en.wikiped…

"...the security could be updated but I do not see how this can be done in practice without a central authority" The same way the fork was fixed and how any upgrade happens with Bi…